Jamb Physics 2011 Past Questions and Answers

Question 36:

• JAMB 2011

The bond between silicon and germanium is

A. Covalent
B. Ionic
C. Dative
D. Electrovalent

Question 37:

• JAMB 2011

A radioactive isotope has a decay constant of 10^-5s⁴. Calculate half life

A. 6.93 x 10⁵s
B. 6.93 x 10⁵s
C. 6.93 x10⁴s
D. 6.93 x 10⁴s

Question 38:

• JAMB 2011

The electrical properties of germanium can be altered drastically by the addition of impurity. This process is referred to as

A. Saturation
B. Bonding
C. Amplification
D. Dopping

Question 39:

• JAMB 2011

If the threshold frequency for tungsten is 1.3 x 10¹⁵Hz, what is its work function?
[H = 6.6 x 10^-34 Js]

A. 8.58 x 10^-19 J
B. 8.50 x 10^-15 J
C. 8.58 x 10^-17 J
D. 8.85 x 10^-18

Question 40:

• JAMB 2011

Which of the following will be applied when a metal Y is used to electroplate another metal X in electrolysis?

A. X is the anode and very high current is used
B. X is the anode and Y is the cathode
C. Y is the cathode and X is the anode
D. Y is the anode and very high current is used